function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_over = newImage("images/home_over.gif");
		aboutus_over = newImage("images/aboutus_over.gif");
		admission_over = newImage("images/admission_over.gif");
		directions_over = newImage("images/directions_over.gif");
		gift_shop_over = newImage("images/gift_shop_over.gif");
		news_over = newImage("images/news_over.gif");
		kid_stuff_over = newImage("images/kid_stuff_over.gif");
		ask_gus_over = newImage("images/ask_gus_over.gif");
		gallery_over = newImage("images/gallery_over.gif");
		links_over = newImage("images/links_over.gif");
		preloadFlag = true;
	}
}

function gallerySwitch(image){
	if (document.images) {
		document.images['ctrPic'].src = image;
	}
}